Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
  • A61N1/00—Electrotherapy; Circuits therefor
  • A61N1/18—Applying electric currents by contact electrodes
  • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
  • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
  • A61N1/372—Arrangements in connection with the implantation of stimulators
  • A61N1/37211—Means for communicating with stimulators
  • A61N1/37217—Means for communicating with stimulators characterised by the communication link, e.g. acoustic or tactile
  • A61N1/37223—Circuits for electromagnetic coupling
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
  • A61N1/00—Electrotherapy; Circuits therefor
  • A61N1/18—Applying electric currents by contact electrodes
  • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
  • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
  • A61N1/362—Heart stimulators
  • A61N1/3625—External stimulators
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
  • A61N1/00—Electrotherapy; Circuits therefor
  • A61N1/02—Details
  • A61N1/04—Electrodes
  • A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
  • A61N1/0504—Subcutaneous electrodes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
  • A61N1/00—Electrotherapy; Circuits therefor
  • A61N1/18—Applying electric currents by contact electrodes
  • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
  • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
  • A61N1/372—Arrangements in connection with the implantation of stimulators
  • A61N1/378—Electrical supply
  • A61N1/3787—Electrical supply from an external energy source

Definitions

• the present invention falls within the framework of provisional cardiac stimulation during replacement of a pacemaker and regards more precisely systems for cardiac stimulation provided with a radio-frequency receiver designed to receive stimulation pulses alternative to those of the pacemaker, emitted by a radio-frequency transmitter external to the patient.
• the electrode that connects the pacemaker to the heart is unipolar, and fitted on said electrode is a radio-frequency receiver bearing on the outside of its casing a plate for contact with the tissues of the patient.
• RF radio- frequency
• the pacemaker carries a plate for contact with the tissues of the patient and both in the case of stimulation by pacemaker and in the case of alternative stimulation by an external transmitter one of the polarities of the signal (normally the negative one) runs along the electrode whilst the other polarity (the positive one), is transmitted to the heart by the contact plates and traverses the tissues of the patient.
• This current configuration presents some drawbacks both as regards operation of the stimulator and as regards the structure thereof, in particular of the radio-frequency receiver.
• the drawback regarding operation of current-stimulation systems lies in the fact that, on account of the high density of the current transmitted, undesirable muscular contractions may arise in the thorax of the patient.
• EP603137 Described in EP603137 is a tool by means of which the connector of the electrode fitted on the pacemaker, which is rendered accessible from outside, can be pushed out of the PM; the tool is provided with means for contact with the electrode that make possible uninterrupted electrical stimulation of the heart throughout the operation of replacement of the PM.
• This type of tool cannot be used for those types of PvF PMs in which it is desired to maintain stimulation with a programmed frequency during the intervention for replacement of the PM.
• a primary aim of the present invention is hence to provide a device that will enable the operator to intervene for a convenient replacement of the PM without occupying the connector of the electrode catheter and without causing absence of continuity of cardiac stimulation.
• the above device comprises the following parts: - a pressure clip (1); an openable radio-frequency coil (2) mounted on the pressure clip (1); and an external apparatus (3) for generating variable-frequency pulsed signals.
• the device also envisages a subcutaneous sterile electrode connected to the external generator (3) for completing reclosing for cardiac stimulation.
• Figure 1 is a front longitudinal view of a clip 1 with openable coil 2 according to the present invention
• Figure 2 illustrates an external apparatus 3 for generating variable-frequency pulsed signals.
• the idea underlying the present invention is to fit on an electrode catheter separated from the pocket of the PM a radio-frequency (RF) coil 2 connected to an external apparatus 3 for generating variable-frequency pulsed signals.
• RF radio-frequency
• the fitting is made without altering the operative conditions of the electrode catheter itself, on which it will be possible to work without any hindrance.
• the coil 2 can be easily and definitively removed.
• the coil 2 is in fact of the openable type, mounted on a pressure clip 1 that renders fitting and removal thereof immediate.
• variable electrical field generated within the coil generates on the circuit, which is formed by the electrode catheter and closes through the patient, a stimulation signal of variable frequency that can be regulated on the external apparatus.
• Subcutaneous reclosing will be effected by means of an electrode that is supplied sterile and is connected to the external generator and anchored to the subcutis by means of a plate, which enables an increase in the surface of contact.
• the device according to the present invention proves indispensable in all replacements of pacemakers (PMs), where it is necessary to maintain cardiac stimulation even for long periods before applying the new pacemaker.
• PMs pacemakers
• the plate described above positioned in the subcutis will complete reclosing for stimulation.
• the regulation provided on the external apparatus it will be possible to stimulate at the desired frequency and proceed to the operations of replacement of the pacemaker. Once replacement is completed, it will be possible to remove the clip without interfering with the connections made.

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39760554

Family Applications (1)

Country Status (4)

Citations (4)

Family Cites Families (3)

• 2007
  • 2007-05-11 DE DE202007018528U patent/DE202007018528U1/de not_active Expired - Lifetime
• 2008
  • 2008-05-09 EP EP08763084A patent/EP2150310A2/en not_active Withdrawn
  • 2008-05-09 US US12/599,231 patent/US8301240B2/en not_active Expired - Fee Related
  • 2008-05-09 WO PCT/IB2008/051859 patent/WO2008139405A2/en active Application Filing

Patent Citations (4)

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